<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>

<body>

</body>
<script>

    const arr = [1, 2, -3, 5, -8];
    /* 需求：检测某个元素是否在数组里面 staus */
    const status = arr.includes(15); // 和字符串的includes类似
    console.log(status);




</script>

</html>